code: def __str__(self):
      cfg = json.loads(json.dumps(self.data))
      return yaml.dump(cfg)
  
imports: import hashlib
  import os
  import time
  import json
  import uuid
  import yaml
  from easydict import EasyDict
  import paddlehub.env
label_desc: Use image node_id 6 for calling the CacheConfig obj's underlying member method code with example usage: obj.__str__() and returns: yaml